Merge pull request #6 from dokku/simplify-usage

refactor: remove shell entrypoint

Dockerfile

@@ -8,6 +8,5 @@ FROM alpine:3.19.1
 # hadolint ignore=DL3018
 RUN apk add --no-cache bash
 COPY --from=builder /go/src/github.com/dokku/semver/semver /usr/local/bin/semver
-COPY entrypoint /usr/local/bin/entrypoint
-ENTRYPOINT ["/usr/local/bin/entrypoint"]
+ENTRYPOINT ["/usr/local/bin/semver"]
 LABEL org.opencontainers.image.description "A tool for generating a semver version from an existing version and a desired bump level"

README.md

@@ -15,9 +15,6 @@ docker build --progress plain -t semver .
 
 # run it with arguments
 docker run --rm semver --input 0.1.2 --bump patch
-
-# run it with environment variables
-docker run --rm -e SEMVER_GENERATOR_INPUT=0.1.2 -e SEMVER_GENERATOR_BUMP=patch semver
 ```
 
 ## Releasing

action.yml

@@ -15,7 +15,8 @@ inputs:
 runs:
   using: "docker"
   image: "Dockerfile"
-  entrypoint: "/usr/local/bin/entrypoint"
-  env:
-    SEMVER_GENERATOR_BUMP: ${{ inputs.bump }}
-    SEMVER_GENERATOR_INPUT: ${{ inputs.input }}
+  args:
+    - "--bump"
+    - ${{ inputs.bump }}
+    - "--input"
+    - ${{ inputs.input }}

main.go

@@ -58,9 +58,24 @@ func main() {
 		parsed.Patch += 1
 	}
 
+	updatedVersion := parsed.String()
 	if addPrefix {
-		fmt.Printf("v" + parsed.String() + "\n")
-	} else {
-		fmt.Printf(parsed.String() + "\n")
+		updatedVersion = "v" + parsed.String()
+	}
+
+	fmt.Printf(updatedVersion + "\n")
+	githubOutput := os.Getenv("GITHUB_OUTPUT")
+	if githubOutput != "" {
+		f, err := os.OpenFile(githubOutput, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
+		if err != nil {
+			slog.Error("Failed to open file", "file", githubOutput, "error", err.Error())
+			os.Exit(1)
+		}
+		defer f.Close()
+
+		if _, err = f.WriteString(fmt.Sprintf("VERSION=%s", updatedVersion)); err != nil {
+			slog.Error("Failed to write to file", "file", githubOutput, "error", err.Error())
+			os.Exit(1)
+		}
 	}
 }